Ventilated multi-ply bag



April 21, 1970 G- GERARD VENTILATED MUTI-PLY BAG Filed July 1, 1968 50 NININININIQ 5 7 INVENTOR. 53 650.055 $56680 %M@ AITTOFIVE Y United States Patent 3,507,443 VENTILATED MULTI-PLY BAG George Gerard, Point Pleasant, N.J., assignor to Jiffy Manufacturing Co., Hillside, N.J., a corporation of Delaware Filed July 1, 1968, Ser. No. 741,366 Int. Cl. B65d 31/02 US. Cl. 229-55 2 Claims ABSTRACT OF THE DISCLOSURE The present disclosure describes a carrier bag for foodstuffs and particularly foodstuffs which are at a higher temperature than room or atmospheric temperature or materials which breathe and either consume air which is within the confines or tend to generate vapors or pressure within the enclosure.

The bags primary use desirably consists of a multiply material the interior lining of which may be an impermeable foil or plastic while the outer ply may consist of paper or suitable'matted material not normally resistant to the penetration of fluid or air. The bag is desirably of the side bellows type and it is an important feature of the present invention to maintain an equilibri urn within the bag or otherwise the foodstuffs will not be maintained in proper condition and the bag may undesirably expand or contract defeating its carrier function.

On the inside fold of the side flaps it has been found desirable to place a series of thin short vertical slots extending through both the paper and liner which will be positioned adjacent to the top of the food material and desirably extending above and below the top of the food material but well below the top closure of the bag. Among the many types of foodstuffs which may be carried in such bags, with preservation of the material therein, are fried potatoes, fried oysters, fried fish and various types of hot foods.

SUMMARY OF THE INVENTION The present invention relates to a ventilated collapsible bag construction for carrying heated foodstuffs and for other purposes. It is among the objects of the present invention to provide a simple, readily constructed economical, food carrying bag construction which will withstand substantial handling and at the same time permit ready egress or ingress of air or vapors from or into the bag when various types of foodstuffs are contained therein, particularly those that are maintained in a heated condition.

Another object is to provide a novel, ventilated bag construction which will be inexpensive and can be readily discarded and may be used for handling a wide variety of foodstuffs without change in the internal atmospheric pressures of the bag, regardless of the temperature of the foodstuffs.

Still further objects and advantages will appear in the more detailed description set forth below, it being understood, however, that this more detailed description is given by way of illustration and explanation only and not by way of limitation, since various changes therein may be made by those skilled in the art without departing from the scope and spirit of the present invention.

In accomplishing the above objects it has been found most satisfactory to provide a collapsible side bag having an impermeable lamination inside of the outer craft papercover which will nevertheless permit ready adjustment of atmospheric pressure within the bag. To achieve this it has been found most satisfactory to provide a grouping of vertical slits adjacent to the top of the bag but well below the top closure thereof, these slits being 3,507,443 Patented Apr. 21, 1970 ice desirably located about or above the position of the top of the foodstuff carried in the bag and desirably arranged to extend for a distance above and below the top of the foodstuffs. If desired, the outer paper lamination may be only partly cut so as to form flaps permitting outward flow of hot vapors but not permitting return flow of air which might possibly cool the contents. However, it has been found satisfactory in the majority of cases to permit free flow in and out of the interior of the bag.

BRIEF DESCRIPTION OF DRAWINGS With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described, and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views:

FIG. 1 is a side perspective view of the bag according to the present invention;

FIG. 2 is a fragmentary side sectional view upon the line 2-2 of FIG. 1 and upon a large scale as compared to FIG. 1;

FIG. 3 is a fragmentary transverse sectional view of an alternative embodiment;

FIG. 4 is a fragmentary transverse sectional view of another alternative embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1 there is shown a bag A having a bottom B, a top closure C, a front and back D and E and side bellows F.

Normally the bag as shown in FIG. 2 consists of an outside paper lamination G and an inside impermeable foil or plastic liner H. The bag is designed to hold hot or fried foodstuffs such as I up to the level K. The top of the bag as indicated at L is collapsible toward the closure C and the expansion of the bag is indicated by the dimension M and is allowed by the separation of the folds F.

The important feature of the present invention res des in the fact that there is provided an area N of small vertical slit openings not more than one-thirty-second to one-sixty-fourth of an inch in length and not more than about one-one hundred and twenty-eighth of an inch in width or at the most between .012 to .0085 inch in width. These are arranged desirably in groups of 8, l2, 16 or 20 and in 2, 3, 4 or 5 rows above and desirably extending on each side of the top line K. It has been found that the provision of these openings on one flap only balanced by the same number on the other side permits the bag to breathe, particularly outwardly, preventing any accumulation of excess pressure. As shown -by the arrows in FIG. 2, excess vapors, steam or even air may pass upwardly.

In the embodiment in FIG. 3 the slots 41 in the liner are generally about two-thirds or half the width of the slots 43 in the outer cover 44. The result is that the air will be retained and hot vapor will be permitted to escape slowly through the narrow outer slots 43.

In the embodiment of FIG. 4 the openings in the liner 51 are slots and they correspond to slits 52 in the outer lamination 53. This will also tend to permit slow outward flow of vapors while permitting ingress of cold air which might disadvantageously affect the foodstuffs,

It is thus apparent that the applicant has provided a food carrying bag designed to overcome varying pressures within and without the bag, as well as varying temperatures and is designed to preserve the foodstuffs.

Having now particularly described and ascertained the nature of the invention, and in what manner the same is to be performed, What is claimed is:

1. An elongated ventilated multi-laminated aluminum foil lined bag having an outer paper laminate and an inside aluminum foil laminate and inward side folds, said inward side folds midway of the length of the bag having interiorly therein a group of closely spaced laterally and longitudinally arranged openings positioned between the top and bottom of the bag to permit escape of steam and excess vapors and prevent ingress of cold air, said openings consisting of small vertical slits no more than to 6 of an inch in length and not more than to ,4 of an inch in width, said openings being longer than they are wide, the same number of openings being provided on opposite sides of the bag, said slits being approximately twice as long as wide and the laminations being closed adherent to one another, and the opening in the paper References Cited UNITED STATES PATENTS 2,593,328 4/1952 Meaker. 2,689,678 9/1954 Wendt 229-53 2,751,140 6/1956 Brady 229-55 DAVID M. BOCKENEK, Primary Examiner US. Cl. X.R. 

